Dynamite numbers. 7 is a lucky number as well as a major and heavily traveled Interstate here in the states from between Cleveland, Ohio, and Columbia, South Carolina.
I can only imagine a information site of things to see, do, eat, gas, stay, sleep, and sightseeing for this. Great opportunity as this is a major North-South route to Myrtle Beach, South Carolina and a main corridor for the SnowBirds (them thar yankees) doing the migratory thing from Florida to Michigan.
I would think as a domain in the 15K range.
As a developed site it could be quite a snag with links, affiliates, etc.